Emplacing apparatus



Dec. 4 1923.

E. L. WIEGAND EMPLAC ING APPARATUS 4 Sheets-Sheet 1 Filed p 1920 W N. E P

Dec. & F923. 31,476,126

' wiEa-mNn EMPLACING APPARATUS Filed Sept. 4; 1920 4 Sheets-Sheet 2 ff. i AM @WkMw/w z?? Dec. 4. 1923; 1,476,126

' E. L. WIEGAND EMPLAClNG APPARATUS Filed Sept. 4, 1920 4 Sheets-Sheet 5 Je W W If i 'i,

n 6 av j v l l .53- .g J; 1 i? Patented Dec. 4, 1923.

UNITED STATES 1,476,126 PATENT OFFICE.

nnwm L. wmeann, or PITTSBURGH, PENNSYLVANIA.

nMPLAcING APPARATUS.

Application filed September 4, 1920. Serial No. 408,360.

To all whom it may concern:

Be it known that I, EDWIN L. VVIEGAND,

a citizen of the United States. residing at Pittsbur h, in the county of Allegheny and State ofTennsylvania, have invented a certain new and useful Improvement in E mplacing Apparatus, of which the following is a full, cleaigand exact description, reference being had to the accompanying drawin s.

his invention relates broadly to the classof power presses, or, in the language of the art to which my invention more directly pertains, to power driven emplacing apparatus; for my present invention has to do more particularly with improvements adaptirig this class of machines to the carrying out of the processes disclosed by United States Patents Nos. 1,133,347 and 1,312,657, granted to me on March 30, 1915 and August 12, 1919, respectively, and by my co-pending application, Serial No. 390,392, filed June 21, 1920. Reference is also made to a com? panion application Serial .No. 423,470, filed November 11, 1920, and which matured into Patent No. 1,387,029; and to a reissue of said patent, dated October 24, 1922, and bearing reissue No. 15,479, and which reissue was granted in pursuance of application, Serial No. 575,430, filed July 15, 1922. The latter application constitutes a division of the present case.

The invention further relates to safety appliances for use with power presses generally.

The main objects of the invention are the provision of power driven apparatus by means of which an element may be embedded in a base or body of impressionable I material (as, for example, the conducting member or resistor element of an electrical heating device, in the supporting and insulating matrix), and whereby this opention may be performed in as highly a satisfactory and far more expeditious manner than has heretofore been done by hand or by manually operated devices with a resultant uniformity of product, saving of time, dispensin with highly skilled and expensive labor, and lessening of the cost while increasin the quantity of production.

Anot ier ob ect is to provide an emplacing machine which is capable of operating only when the element that is to be emplaced is in proper relation to the base arranged to receive it. a

A further object is to provide a power press with control means requiring the simultaneous employment of the operators two hands'for setting the machine in mo-- tion thus insuring the operator against injury by precluding the presence of his hands between the head and bed of the press when the press is actuated.

A still further object is to provide means preventing the'press from repeating should the operator be tardy in releasing the manually operated device that sets the press in motion.

The foregoing objects, and others which will become apparent as this description proceeds, are attained in the embodiment-of my invention illustrated in the accompanyin drawings wherein- Fig. l is a side elevation of a machine incorporating my improvements;

Fig. 2 is a front elevation thereof;

Fig. 3 is an enlarged section on the line 33 of Fig. 2;

Fig. 4 is a further enlarged bottom plan view of the head of the press, the view being taken as though looking in the direction of the arrows 4, 4 from line a-a of Fig. 3;

Fig. 5 is a view as though looking from line a'a of Fig. 3 in the direction of the arrows 5. 5, the same showing the bolster and bed of the press on the same scale as that of Fi 4;

F ig. 6 %Sheet 2) shows,in perspective and in separated condition, various members carried by the head of the press and includes the element to be empla'ced: and the parts of the form whereby it is temporarily supported;

Fig. 7 (Sheet 3) is a perspective view of the parts revealed by a section on the line 7-7 of Fig. 3; and Fig. 8 is a sectional detail on the line 8-8 of Fig. 3.

In the embodiment herein illustrated, 1 represents the standard of a press to the front of which is secured a bed 2 and in operative relation to which a head 3 is sustained by a slide 4 that is guided in the upper front portion of the standard. The slide has the usual connection through the eccentric strip 5 and bushing 6 with the crank 7 of a shaft 8 that is journalled within the top of the standard and carries at its rear end a wheel 9 that is adapted to be locked to the shaft by clutch mechanism which I shall presently describe. Collars 10 are applied to the shaft on opposite sides of the hub of the wheel to retain the latter against longitudinal displacement on the shaft. The wheel 9 may be in the form of a belt ,pulley, as herein shown, and through which power may be directly applied to the shaft 8 when the clutch'is actuated; or it may constitute a gear that is driven from a pinion in accordance with a well known alternative arrangement that is employed when greater power is required than can be transmitted through a belt and pulley, or when circumstances make, such an arrangement preferable or necessary.

A form holder is secured, as by screws 16, to the head 3 and is designed'to receive a form 17 which, in the present instance, is provided with a series of-pins 18 whereon the element E of an electrically heated sad iron is adapted to be wound. It will be understood that this particular form may be replaced by others adapted to the various. uses to which my iigvention may be put. The holder 15 has guides 19 along its opposite sides and between which the form 17 is adapted to he slid until an adjustable stop 20, carried by its forward end engages an abutment 21 that is sustained by a depending lug 22 of the holder and which abutment is in the nature of an electric switch that is closed by the engagement .of the stop with it. The purpose of this switch will be disclosed presently, but at this time it may be explained that the engagemen't of the stop with the abutment properly ositions the form within the holder in the first place, so that the element will,be in correct relation to the receiving base, and in the second so that bores 25 of the form will register with bores 26 of the holder. The form 17 includes a face plate 27, which carries the previously mentioned pins 18 and a stripper 28 that is slidable along the pins and is attached to the face plate by screws 30 which have their lower v ends screwed into'the stripper an'dextend through apertures in the face plate and have heads-which are reciprocahle within the bores 25.- Springs 31 are interposed. between the heads of the screws 30 and the face plate 27 and serve to retain the stripper against the face plate with the ends of the pins 18 protruding to receive the ele- -ment E. The form, as a self-contained unit, may be placed within and withdrawn from the holder 15 by means of a handle 33 wherewith' it is provided;

Pins 35, which depend from the legs of a spider 36, occupy the bores 26 of the form holder, and the' pins are held retracted within the bores with their lower ends flush with or slightly above the underneath surface of the holder 15 by a spring 37 that is interposed between the holder and the underneath surface of the spider. A knob 38 which rises from the center of the spider,is

engaged within a depression of a finger 40 that occupies ,a cavity 41 in the head 3 and projects forwardly through a slot 42 and has adjustable connection with the lower end of a plunger 43, guided within bosses 44 and 45 of a plate 46 that is secured to the slide 4 of the'press, An abutment is provided by nuts 48 that are threaded u on the plunger a suitable distance above t e boss 44, and between this abutment and the boss 44 is interposed a spring 50 which tends to elevate the plunger and with it the finger 40. A seat 51 is carried by the plunger above the nuts 48 and on it rests a comparatively heavy compression spring 52 thatsupports a thrust element 53 arranged to be engaged by the forked end of a U-shaped rocker arm 55 that is pivoted at 56 to a lateral extension 57 of the plate '46. roller 58 is carried by the opposite end of the rocker arm for cooperation with a cam 59 that is secured to the outer end of the crank 7. The cam travels in the orbit of and in fixed angular relation to the crank so that the elevation 59* of the cam is effective as an actuator for the rocker arm. only while the crank swings through the extreme lower portion of its throw. 7

A bolster 60, applied to the. bed 2 of the press, is surmounted by a cushion'61, preferably of rubber,,wh ereon is adapted to rest the base B, which,.in the present instance, is that of an electric sad iron. Whenythe machine is gsed for emplacing the heating or resistoreleme-nts of other electrical devices, the part corresponding to the sad iron base B is sustained by the cushion 61.

The base B has a cavit that is filled with an impressionable or p astic material indicated at b. Suitable plates are supported above the bolster 61 by studs 66 in .a position to overlie the edges of the base andrestrain the same, against upward movement when the form is retracted. The base" is properly positioned by gauges 68 that are threadedthrough studs 69 that rise from the bolster." i

The clutch employed for locking the wheel 9 to the shaft 8 is ofa well known type'a'nd comprises a ke 7 5 which normally fits with in a semi-cyliiidrical recess inthe side of the shaft and s adapted to be oscillated so that a part of it enters a keyway in the inner wall of the hub, thereby to lock the shaft and wheel together. A spring 7 6,-which has one of its ends anchored to the shaft 8 and its opposite end toa pin projecting from the key 75, tends to rock the key, in a direction to engage it within the keyway ofthe wheel. Normally, however, the key is restrained from moving in response to the spring by a bolt 77 wherewith a lateral hookedextension 81 of the key engages. The bolt is shown as guided within lugs 78 of the press standard and as elevated by a spring 79 that is interposed between the lower lug 78 and a collar 80 that is secured to the bolt.

The press is equipped with the usual pedal for actuating the clutch, and the connection between the pedal and. the clutch controlling bolt 77 is effected, according to my invention, through a link 86 that is pivotall connected at its lower end to the peda is guided within a support 87 ex-' tending from the standard of-the press, and terminates at its upper end in an -enlar ement 88 whereon is pivoted a latch 89 t e nose whereof is adapted for engagement with a projection 90 on the lower end of the bolt77. A block is pivoted to the end of the latch 89 opposite the bolt, and a second block 96 is pivoted to the former block. The pivotal axes of the blocks are at right angles to each other so that the second block has a universal movement with respect to the latch. The rear end of a push rod 97 is engaged through an-aperture of the block 96 and is held in a properly adjusted position with respect thereto by nuts 98 that are screwed on the threaded end of the rod on opposite sides of the block. The forward end of the rod is sustained within a guide 100, and the rod is moved forwardly by a spring 101, one end of which is secured to the rod and the other to an adjacent part of the press. The rod has-a stop 99 for limiting its forward movement. A roller 102 is carried by the forward end of the rod for cooperation with a cam 103 that projects laterally from the plate 46, which plate, it will be remembered, is attached to the slide 4. Therefore, every time the slide 4 descends, the cam '103 will engage roller 102 and push the rod 97 rearwardly to oscillate the latch 89 and release the bolt 77. Accordingly, as soon as the press starts to operate b reason of the release ofthe clutch, the bolt 77 will be released so that it may resume operative position and reengage the hooked end of the key and return it to ineffective position at the completion of one rotation ofthe shaft. It'will be noted, also,

that the cam 103 is of sufiicient length to hold the latch disengaged during. the entire operation of the machine, wherefore subsequent depressions of the pedal could have no effect on the clutch.

I also propose to use an electrical control by means of which the operator is revented from pressing the pedal 85 until t e form 17 is properly located within the holder, and until his otherwise. idle hand is occupied so as to prevent his gettin it under the bed of the press. This electncal control I shall now describe.

A manually operated switch is conventionallyillustrated at 105 as supported by the part of the press wherein the slide 4 is guided. To close the switch, the operator must press the handle 106 inwardly. In so doing, he moves the handle into engagement with a pin 107 that is swung within the lower endof a pendant 108 pivoted at 109 to the frame of standard of the press. The pin 107 isalso arranged to be engaged by a cam 110 that is carried bythe plate 46 so that, when the plate descends with the slide 4, the cam 110 will, through the intervention of the pin 107, open the switch 105.

Pivoted at 112 to the standard of the press isa latch- 113 for cooperation with a projection 114 of the pedal 85. A spring 115, which has one end connected to the press standard and its other end attached to the latch, teiids to rock the latch in a direction to engage it with the projection 114. The latch incorporates an armature 116 of an electro-magnet 117 that is supported in operative relation to the armature by a bracket 118 that is shown as secured to the standard 1. An electric circuit, represented by the conductor 120 and having a -source of current 121, shown conventionally as a battery, includes the electro-magnet 117, switch 105, and the switch represented by the abutment 21 of the form holder 15, the frame of the press constituting a part of the circuit as the latter switch and the electro-magnet are grounded therethrough. By reason of this arrangement, when the operator inserts a form within the holder a suflicient distance to close switch 21 and presses the operating handle of switch 105 to close this switch,he establishes a circuit through the electro-magnet 117, thereby retracting latch 113 and releasing the pedal 85, permitting him to actuate the clutch to set the machine in operation. The initial movement of the slide 4 will break the mechanical connection between the pedal 85 and the clutch bolt 77, and in addition to this will open the switch 105, breaking the circuit including the magnet117 thus deenergizing the magnet and causing it to release the latch 113 so'that thelatch will be in condition to lock the pedal 85 elevated when it is released by the operator. 7

An obvious modification of the arrange ment above described would be the omission of switch 105 from the electric circuit, in which event the placement or proper positioning of the work within the machine would alone unlatch the dal.

In the use of the mac ines disclosed by my earlier Patents Nos. 1,133,347 and 1,312,657 hereinbefore referred to, the winding and embedding of the element are com-- bined in the operation of the same machine. It ,is characteristic of my present invention that its function is limited solely to embedding the element. In the commercial use of this invention it is preferable to employ a pluralityof forms to which the element is applied as a separate and distinct operation.

iao

' rocker arm 55.

A prepared base is placed upon the bed or support and properly positioned by the gauges 68. A form having the element applied, is inserted in the holder 15 so that its adjustable stop 20 engages the abutment 21., thus properly positioning the form with respect to the base and making electrical contact with the abutment which constitutes part of the electrical control circuit grounding the circuit at this point/ The operator next closes the switch 105 which completes the electrical circuit and energizes the electro-magnet 117, releasing latch 113, and permitting the operator to depress the pedal and actuate the clutch; This sets the/inachine in operation, and upon, the initial downward movement of the slide 4 and plate 46 the cam 103 shifts the rod 97 rearwardly to unlatch the bolt 77, permitting itto resume normal position under the influence of its spring -79. At the same time, the switch 105 is o ened by cam 110 through the intervention 0? an opening of the electrical control circuit,

and the return of latch 113 to efl'ective position so that as soon as the'pe'dal is released by the operator it will'be reengaged by the latch and locked in elevated position. As the crank swings through the lower arc of its throw and slide 4 arrives at the bottom of its stroke. the form 17 is engaged with the base B and the element is emplaced within the receiving material and the material progressively compressed in accord ance with the processes disclosed by my earlier cases. During the emplacing of the element the cushion 61 yields to compensate for any irregularities in the base or in the body of receiving material and to introduce into the operation a time interval wherein spring 52 is compressed by the engagement of the elevated portion of cam 59 with roller 58 and the consequential oscillation ofthe The tension thus .stored within the spring 52 is transmitted through plunger 43, finger 40, spider 36, and pins 35 and 30 to the stripper plate, and this tense condition prevails during the initial return movement of the slide and form and while the ins 18 are being withdrawn from the receiving material. At the commencement of the return movement of the slide, the stripper plate is carried away from the base wherein the element is now embedded. When the stripper plate is some distance away from the base the ressure upon spring 52 is released, the e evated portion of cam 59 having withdrawn from roller 58 with the result that springs 52 and 37 return the parts respectively sustained thereby to their original positions.

In this connection it may be pointed out that until the parts resume normal condition, the pins 35 of the spider 36 interengage within the bores of the form' and prevent rod 167. This results ina yielding support for a receiving element and a carrier for an enterin element one of said members being movab e toward and from the other, means for removing the entering element from the carrier when it is emplaced within the receiving element, and

mechanism for operating the movable one of the aforesaid members and the removing means- 2. In a machine of the character set forth, the combination of two members comprising respectively a yielding support for a receiving element, and a .carrier for an entering element; rotary drivin means for reciproeating one of said mem ers toward and from the other, and means for removin the entering element from the carrier'w hen. it is emplaced within the receiving element.

3. In a machine of the character set forth, the combination of two members comprising respectively a yielding support for a receiving element, and a carrier for an entering element; and means for imparting to 'one of said members a movement toward and from. the other which movement is of greater extent than the maximum distance between the elements when sustained by said members.

4. In a machine of the character set forth, the combination of two members comprising a support for a receiving element and a carrier for an entering element, one of said members being movable toward and from the other, means for removing the entering element from the carrier when it is emplaced within the receivin element, a common actuator for the movabIe one of the aforesaid members and the removing means, and driving connections including a resilient element between the removing means and the actuator.

5. In a machine of the character set forth, the combination of two members comprising a support for a receiving element and a carrier for an entering element, one of said members being movable toward and from. the other, means for removin the entering element from the carrier, an an actuator for the movable one of the aforesaid members and. for the removing means and serving to impart to said means member concurrent movement in one direction andindependent movement in the other direction.

6. In a machine of the character set forth, the combination of two members comprising respectively a support for a re ceiving element and a carrier for an enterin element, one of said members being movab e toward and from the other, means for removing the entering element from the carrier when the entering element is emplaced within the receiving element, a rotary'driving means having two operating parts eccentric of its axis of rotation, operative connections between one of such parts and the movable one of the aforesaid members, and similar connections between the other operating part of the driving means and the removing means.

7. In a machine of the character set forth,

the combination of a support for areceiving element, a carrier for an entering element that is movable toward and from the support, means supported by .the carrier for removing the entering element from the carrier when the entering element. is emplaced within the receiving element, a rotary driving member, operative connections between the carrier and a part of the driving mem-. ber eccentric of'its axis of rotation whereby a movement of the carrier toward and from the support is effected by a rotation of the driving member, and a device carried by the driving member and situated eccentrlc of its axis of rotation for imparting a movement to the aforesaid removing means independently of the movement of the carrie 8. In a machine of the character set forth, the combination of a support for a receiving element, a carrier for an entering element that is movable toward and from the support, means movably sustained by the carrier for removing the entering element from the carrier when said enterin element has been emplaced within the reoeivin element, and driving means for moving t e \carrier and the removing means in unison toward the support and independently of each other from the support.

9. In a machine of the character set forth, the combination of a support for a receiving element, a carrier f r an entering element that is movable toward and fromithe support, means movably sustained by the carrier for removing the entering element fromthe carrierwhen said entering element has been emplaced within the receiving element, and driving means for moving the carrier and the removing means bodil'y toward and from the support andv for importing into the movement of the removing means a tardiness over that of the carrier.

10. In a machine of the character set vforth, the combination of a standard, a bed supported thereby and whereon a receiving element is adapted to rest, a head reciprocably supported by the standard and arranged to carry an" entering member, a drive shaft rotatably supported by the standard and having a port-ion "eccentric with respect to its rotating axis, operative connections between said eccentric portion and the head, a cam secured to the eccentric portion of the shaft, and means sustained by and movable with respect to the head for effecting a removal of the entering memher from the head after the same has been emplaced within the receiving element, said means being rendered efi'ective by the afore said cam as the head retracts from the receiving element. v

11. In a machine of the character set forth, the combination of a standard, a bed sustained thereby and whereon a receiving element is adapted to rest, a head reciprocably supported by the standard and arranged to carry an entering element, a driv ing member rotatably supported by the standard and having a portion eccentric of its rotating axis, operative connections b tween said eccentric portion and the head, means incorporated within the head for removing the entering element from the head when said" entering element has been emplaced within the receiving element, and means carried by the driving member for importing a dwell in the movement of the removing means.

12. In a machine of the character set forth, the combination of a support for a receiving element, a head movable toward and from the support and incorporating a form holder, a form designed to be received by the holder and arranged to carr an entering element, a stripper embodie in said form for. removing the entering element when the same has beenemplaced within the receiving element, means carried by the head for actuating ,the stripper, and mechanism for reciprocating the head and for rendering the stripper effective.

13. In a machine of the character set forth, the combination of a standard, a bed sustained thereby and whereon a. receiving element is adapted to rest, means for properly-positioning the receiving element upon the bed, a head reciprocably supported by the standard in operative relation to the support, the head incorporatinga form holder, a form designil to be received and supported by the holderiandarranged to carry an enter ing element, I stripper embodied in the form for removing the entering element from the form when said entering element is emplaced within the'receivin element means guided within the head or actuating the stripper, a plunger reciprocably supported by the head and movable independently thereof and having operative connection 5 ard and having 'a portion eccentric of its axis of rotation, operative connections between said portion and the head, and a cam carried by the eccentric portion for retaining the plunger depressed during that part driving member which effects the initial retraction of the head from the bed,

14. In a machine of the character set forth, the combination of a standard, a bed sustained thereby and whereon a receiving element is-adapted to rest, means for properly positioning the receiving element upon the'bed, a head reciprocably supported by the standard in operative relatlon to the su port, the head incorporating a form ho der, a form designedto be received and supported by the holder and arranged to carry an entering element, a stri per embodied in the form for removing t e entering element from the form when said enterof the throw of the eocentric'portion of the ing element is emplaced within the receiving elemeint, means guided within the head for actuating the stripper, a plunger rcc-iprooably supported by the head and movable independently thereof and having operative connection with the strip er actuating means, yielding means normal y sustaining the plunger in a given position with respect to the head, a, rocker arm pivotally supported from the head, a yieldin element interposed between one end of sai arm and the plunger, a driving member rotatably supported by the standard and having a portion eccentric of its axis of rotation, operative connections between said portion and the head, and a cam carried by the cocentric portion and arranged to engage the opposite end of the rocker arm during that part of thethrow of the eccentric portion of the driving member which eifects the initial retraction of the head from the bed.

In testimony whereof, I hereunto aflix my signature.

EDWIN L. WIEGAND. 

